heterogenous vaccine

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• vaccine — Originally, the live v. (vaccinia, cowpox) virus inoculated in the skin as prophylaxis against smallpox and obtained from the skin of calves inoculated with seed virus. Usage has extended the meaning to include essentially any preparation… …   Medical dictionary

• Streptococcus — A group of bacteria, familiarly known as strep, that can (and do) cause a multitude of diseases. The name comes from the Greek strepto meaning twisted + kokkos meaning berry, and that is exactly what Strep look like under the microscope, like a… …   Medical dictionary